A "trail race" is a type of running competition that takes place on a natural, unpaved path or trail, usually through forests, mountains, or other outdoor locations. Full definition
My posture and core strength has improved dramatically, and has actually helped prepare me well for an upcoming 100 - mile trail race. (factor3fitness.com)
I love trail races and its a nice change from always being on the road. (marontherun.com)
Pros: Fast and responsive feel, widened toe box, light enough to be used for trail racing, full - length Everun midsole for increased comfort, durable outsole that can handle a wide range of terrains (businessinsider.com)